Iron bolts: where to get it

Source	Quantity	Chance per roll
Guard []	2–12	10/128
Guard (Edgeville) []	2–12	10/128
Guard (Falador) []	2–12	10/128
Guard (Varrock) []	2–12	10/128
Highwayman []	2–12	5/100
New Varrock guard captain []	1–6	Uncommon
Pirate []	2–12	10/128
Port Sarim guard []	2–12	10/128
Skeleton (Tarn's Lair) (Medium level) []	7	3/128
Uncleaned find [{'content': 'Estimated rarity may be inaccurate due to a low sample size.', 'name': 'inaccurate'}]	1–8	15/744
Zombie []	2–5	1/128
Zombie (New Varrock) (Pickpocketing) []	1–5	Unknown